Aldo van Eyck (; 16 March 1918 – 14 January 1999) was a Dutch architect. He was one of the most influential protagonists of the architectural movement Structuralism. Family He was born in Driebergen,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa02c0b32476d55422d4026072b9479a4612257d394b468f3ab1ee83161d2ff. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/061ba28f-adfd-48eb-b64f-973a5f13ceed.json and https://artists.proofprofile.net/proofs/artist/061ba28f-adfd-48eb-b64f-973a5f13ceed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d6e1d46bf14acb1e4802cd26c95ca89fabdd346cd43145fcfe1b95ac8366f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS802350721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9a7c3aa95a2feb48bc59af735260696b07261ec383bcef047c7e3ba218ebf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS802351717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f469530f0b57af01b2ef5166fafeacaa5b53c6963315e5ed077b1edc6c6583. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0108b19d51f89bc304d8d9fab5bd9c88b6eddb5089dabec98b90dd08fab2d7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea9524da7cf01843e519abbf01b26a1b835184f8072a8af88a278b43561ce2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf104da559d8f0b1997e7f516d74da6baee9b1fc3e64d2ac46f3486e59157d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f68b253b98125baabc72652ec715591f41ea6d4e8eef8711ee67817fa561a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9100dc6a46461e8c2d6cdbdbbd9d8c0f2e6c08be156cabd0b3206f750728f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b923a65dbdb7aad71faa89e80974c03f23cf7375061dc889c6c0df03734f7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f3e7f608ffa4fda3fa338e922de257bd21264916aaab3eb7b558efffa9bdda. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf104da559d8f0b1997e7f516d74da6baee9b1fc3e64d2ac46f3486e59157d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57032428dd16fb564855d39a8de4e659368ff6c287be5902c39c56c7dd9ecb0. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea9524da7cf01843e519abbf01b26a1b835184f8072a8af88a278b43561ce2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9100dc6a46461e8c2d6cdbdbbd9d8c0f2e6c08be156cabd0b3206f750728f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc1643edaa4c31a93de97900d76d948aaa1be1c2268dfcd8b6ab4c5f09ddec1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1967d14ca045d0c3dddc692f2e15c211d0c4a68edfa65e3897e23202829af16. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5e35c84f7328e18d817528a57c4485c6ab56330e58d534209bb434ffe97de5. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f68b253b98125baabc72652ec715591f41ea6d4e8eef8711ee67817fa561a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d757110df2c7337579a516d098801621c28dc55396d064558856166ddeee7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:35:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f469530f0b57af01b2ef5166fafeacaa5b53c6963315e5ed077b1edc6c6583. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fef4cdd879af397a09e090f504e424f8b78824ee1ed36c12300b178ada4c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0108b19d51f89bc304d8d9fab5bd9c88b6eddb5089dabec98b90dd08fab2d7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102500698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d26697a9f91d5dc22c65f37447145be708539fefa3e239e45b6e67482a4f27. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102501181.